At the end of fiscal year 2004, the federal debt of Country C is $278,560,125,000. What is the closest estimation of this amount? Express your answer in the form of a single digit times an integer power of 10.

3x10 Exponent = 11
2x 10 Exponent = 11
2.79x 10 Exponent = 11
3x10 Exponent = -11

1 answer

The closest estimation of the federal debt of Country C at the end of fiscal year 2004 is $2.79x10^11.